Spray pump capable of being actuated by a hand lever

Abstract

The invention relates to a hand lever-operated spray pump ( 3 ), particularly for attaching to bottles ( 2 ) or similar, having a pump plunger ( 6 ) which moves linear in a pump chamber ( 7 ) on the housing side and which is connected with the hand lever ( 5 ) at the rear of a mouth piece opening ( 9 ) and which returns to its starting position as a result of a spring loading, and proposes, for the purpose of achieving a structurally simple, functionally reliable solution, to allocate two hinge points (I, II) to the hand lever ( 5 ) one of which (I) is movable in a linear guide on the housing side and the other (II) is arranged on the housing on the side opposite to the mouthpiece ( 9 ). In such a way that both hinge points (I, II) are connected by means of two buckling bridge sections (a, b).

What is claimed is:  
     
       1. A pump dispenser comprising: 
       a. a housing part having a front end and a rear end and a downward portion for mounting on a container;  
       b. a pump cylinder fixedly disposed on the housing part and having an open end facing the front end of the housing part and formed with a slot along one side of the open end;  
       c. a piston/nozzle assembly reciprocable in the open end of the cylinder;  
       d. a trigger/cover assembly comprising a cover portion having a forward and a rearward end, the rearward end being hingedly connected to the rear end of the housing part and a generally L-shaped trigger portion having an upper end, an intermediate portion and a lower end, the upper end being hingedly connected by a living hinge to the forward end of the cover portion, the intermediate portion being pivotally connected to the piston/nozzle assembly through the slot, the lower end of the trigger portion serving as a trigger lever, the cover portion and the upper end of the trigger portion defining a straight line through the living hinge when the piston/nozzle assembly is forward in the cylinder.  
     
     
       2. A pump dispenser comprising: 
       a. a housing part having a front end and a rear end and a downward portion for mounting on a container;  
       b. a pump cylinder fixedly disposed on the housing part and having an open end facing the front end of the housing part;  
       c. a piston/nozzle assembly reciprocable in the open end of the cylinder;  
       d. a hinge support element extending upward from the housing part and having a hinge element at a forward end above the cylinder,  
       e. a trigger element having its upper end pivoted to the hinge element, an intermediate portion pivotally attached to the piston/nozzle assembly and a lower portion serving as a trigger lever, the improvement wherein the hinge support element is pivoted to the housing part at its rear end, and the cylinder has slots on its opposite sides and the pivotal attachment of the trigger element rides in the slots.  
     
     
       3. A pump dispenser comprising: 
       a. a pump body including a horizontal cylinder having an open end and longitudinal guide slot on a side of the cylinder from the open end,  
       b. a piston in the cylinder,  
       c. a trigger assembly pivotally secured to the body at a first point and including a lever and a tension element joined by a living hinge, parts of the tension element and the liver defining a flat horizontal plane through the living hinge when the piston is in an extended position in the cylinder,  
       d. a transverse element extending between the trigger assembly and the piston at a second point on the opposite side of the living hinge from the first point and sliding in the longitudinal guide slot,  
       whereby moving the lever in one direction draws the first and second points toward each other to move the piston as the living hinge flexes.